Boiler-pressure regulator.



UNITED STATES PATENT,

ISAAC a, BACKLUND, or oriroaeo, mmnoxs, assrenon 'rocnnmcx nneinnnnme00..

OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS,

. BOILER-PRESSURE REGULATOR.

To all "whom it may; concern:

Be it known that I, Isaac A. BAGKLUND,

a citizen of the United. States, residing at Chicago, in the county ofCook and. State of "Illinois, have mvented certamnew and useprovementsin Boiler-Pressure Regulators, of which the following 1s aspecification.

This invention relates to ClaIKIPBIECOIItIOl- I jecft' is the provision.of improved means under this control of steam pressuresobtainhereinafter described and claimed. a In the accompanying drawings,Figure 1 i more or 1e i at a practi .a

VVith these ends in View, the invention consists in the novelconstruction, adapta ing in a boiler, for regulating the action of a*hercbythe combustion within" the lace may be governed to generatesteiu'n and maintain the steam .lly uniform pressure.

damper boiler tion and combination of parts, as, will be isa view partlyin elevation and partly in vertical section, of apparatus embodying thepresent invention. Fig.2 is a verticalsecdtional view to an enlargedscale of the water controlling valve sh W11 ir; a different positionfrom that in W ich it is represented in 1 the other view.

n a a tilesignates a portion of 'a boiler with pipe Referring to thedrawings, the numeral 5 connections 6 and- 7 respectively commum eatingwith the interioro'f the boiler above and below the Water level thereof,which is indicated by W'. Said pipe cormections constitute branches of apipe 8 which communi "with a depending portion in the nature of yprovided with a flexible extension 11 isconn'ected to the lower end of areceptacle I 12 the latter being supported upon a rod 13 Wliicli, inturn, is supported by being pivotbymeans of a T- tting 8 and a nipplethe up a, erend of a tank 9,

Shut-nit coo s 6 and 7 are provided for the aforesaid connections 6 and7 to admit water or steam into said tank, as may be desired Said tank isdesirably provided.

apipe of relatively small diameter, and

extendingaxially therein to within a short distance of the-bottomOfSiLlCl extension is thjez lovver end ,of a tube 11 which open atbQtlLfBIldS. At its uppenend this tube is which any connected at 14 toan armlfi of a lever whose other arm 15 carries in an" adjustedSpecification o! Lettersiatent.

ling apparatus for steam boilers and its 0b-- position acounterweightilfi which serves to retain the receptacle 1n itsuppermostposi-v tion when the same is empty,

Said lever is fulcrumed at 17 toa column 18 which, as shown,IS'COmIJIiSBd of a plurality of pipe elements including the aforesaidnipple8 19 represents a hydraulic cylinder rigidly secured to astationary support, indicated by 20, and is connected by a pipe 21 witha side outlet 22 of the casing 22 of a so- PatentedAug. 20, 1918.Application filed May 3,1916. Serial m. 95,140.

called three-way rotary valve 23 which. may

such, for example, as a citywatcr main.

The other pipe connection 25-is provided with an extension 25' throughwhich Waste water is discharged.

Operable through a packing-box 26 provided on said hydraulic cylinderisa plunger 27 whose m-otruding end is secured to a sash 28 which isguided for vertical movements with the plunger by rod 29 secured to thecylinder and passing through an aperture provided in the sash element28. a The lower end of said sash is connected by a. link or chain 30 toa lever 31 which is fulcrumed at 32 and is connected by a chain 33,passing over a guide sheave 34, with an arm 35 of a bell-crank lever 35secured' to the spindle 36 which serves as (he pivotalsupport for thestack damper 37.

38 represents a weight carried by;lever 3 5 and tends to hold saiddamper in itsopen position. a

The aforesaid valve-2 3 is provided with an operating arm 39 ada ted tobe swerved to rotatably move the va ve through the instrlm'lcntality 0fwiper fingers 40' and 41 secured to .a rod 42 which is connected by apin 43 to lever arm 15 and extendsthrough a guide 42 v A charge ofliquid, preferably mercury, is supplied to the tank 9 and maybesupplemented by water admitted, from the boiler 1 by opening the valve7. hen j the steam pressure within the boiler-exccedsfithat for whichthe apparatus is regulated, it will act upon the liquid surface in tank9 to force the mercury upwardly through tube 11 into receptacle 12 untilthe Weight of thefm'er cury inthelatter is suliicient to overbalance thepower of counterweight 16, whereupon the lever 15--15 will be influencedto lower the rod 12 and the fingers l0 and 41 thereof.

In such movement, the finger 40 engages .thearm 39 torotate valve 23 soas to afford furnace is checked with a consequent les-,

sening in the generation of steam until the a steam pressure isreducedbelow what is requisite to support the column of mercury in tube 11 andreceptacle 153, whereupon the mercury escapes from the receptacle andenables the counterweight 16 to assert its power and influence the leverl515 to impart upward movement to the fingers and 41 whereby the finger41 will engage the arm 39 to rotate valve 23 into opencommunicationbetween the waste pipe 25 and the pipe 21. Under suchconditions, the water escapes from the cylinder, the plunger and sashdescend, and the weight 38 effects the opening of the damper with anincreasingly ra id productionot' steam.

ncluded inthe invention are appliances for regulating the action of theapparatus so far described which might be termed a governor and servingmoreover, to render the apparatus capable of readily overcom- -'ing theinertia of the aforcdescribcd movfore the boiler able parts whileregulating the action of the same to shut ott' and reopen the draftberessure appreciably rises above and falls lielow that for which theapparatus is adjusted with an assurance of a practically constant steampressure.

For these purposes, I securea hollow tubular member v4 in parallelrelations to the lever 1515 by supporting the "end a thereof inanaperture 48 of the weight 16 andfrom near the other end 7) in thelever standard 41.

Within said member is provided a quantity of mercury, indicated by 49.

50 represents a relatively. heavy bar supported from an end 44 of achain or cable 45 which passes over guide sheaves 46 and 46 and hasitsother end connected to the plunger 27. The bar 50 is provided with aslot 51 to accommodate a stud provided on the lever arm 15, said studbeing engageable by pins 53/ or 53 disposed in holes provided above andbelow the stud.

In operation, an upward movement of the plunger 27 caused by an increasein the boiler pressure, as before explained, will cffeet-the lowering ofthe bar 50 until the pin 53 encounters the stud 52 whereupon the weightof the bar will cooperate with the counterweight 16 to overcome theopposing weight of mercury in receptacle 12 and that in the end 7) ofthe member 47.

\Vhen the plunger descends, the bar 50 ascends, whereupon the pin 53becomes operative to tilt the lever-1515 in the contrary direction-thatis to say} from the dotted line position w to the position in which itis represented by fulllines in Fig. 1.

It ,is apparent that when the weight of the member 50 is added to weight.16,'1t imparts to the lever 15-45 an initial movement which brings itback to substantially its original position asshown in full lines inFig. 1. Y The oflice of the bar is to cooperate with or oppose the,force due to the action of the mercury in receptacle 12 to overcome theinertia of the movable parts and effect the initial movements of thereferred-to lever and the member until the mercury therein can flow tothe opposite end of the same, thereby asserting its power to rapidlycomplete the respective tilting movement of the lever, and a quickchange in the position of the valve.

From the foregoing, it is evident that the damper 37 opens or closeswith relatively slow initial movements so. that. the fire may becorrespondingly accelerated or checked.

\Vhat I claim, is

1. In apparatus of the class described, a steamboiler, adraft-regulating device, a hydraulic cylinder, a plun er therefor, waterpipe connections, a valve therefor, a lever operativelv connected tosaid valve and influencedv by steam pressures obtainin 10-5 'within'said boiler whereby water is caused to be admitted to or discharged fromthe cylinder to actuate said plunger, a member containing liquidoperating with said lever, and a slotted bar operatively connected tosaid plunger and engageable'with the lever and cooperating with theweight of the liquid within said member to accelerate the 7 action ofthe valve in controlling the flow of water to and from saidcylinder.

2. In apparatus of the class described, the combination with a steamboiler-,a draftregulating device therefor, a liquid-containing tank.pipe connections between the upper end of the tank and the steam spacewithin the boiler, a liquid receptacle. connections including a flexiblemember making comnmnication between the lower end of said tank and thereceptacle, a lever supporting said rece tacle for vertical movements,and

means tending to elevate said receptacle, a cylinder, a plungertherefor, operative connections between the olun 'er and said draftdevice. a three-wav valve, a pine connecting the cylinder with-thevalve, a water-supply 1 .zvepoa pipe and a water-waste pipeWiltlllt't'ittl with the valve. and operative connect tohs between saidl ver and the valve whereby the latter is inllueneed to admit a quantityof water into the cylinder to start the ac ion oi said plunger foroperating said dratt devices when an increase of the steam pressure.within the boiler all'ects the receptacle to cause the same to descendand serving to influence the valve to start the release of water fromthe cylinder when the boiler pressure decreases below what is necessaryto retain the liquid in said receptacle, of .means operatively connectedwith said plunger and engageable with said lever and serving tosupplemeut the power atl'orded by the weight of lil|uid\vhich issupplied by the boiler pressure to said receptacle.

2). In a boiler pressure regulator. the combination with a boiler andcombustion regte lating apparatus. of gravitv operated means and meanswhich acts against said gravity operated means. an element displaecahleby steam pressure of the boiler for moving: the gravit v operated means,a power supple inn medium control shifted by the gravity operated means.the movement of which supplies the said medium for moving the.combtistior retz'ulating apparatus and the means which act against saidgravity operated means to restore said gravity operated means-t0approxii-nately its position before it vas shifted whereby a predermined variation in the boiler pressure will shift said power supplymedium control in the opposite direction. thereby releasing said medium.

4. In a boilerpressure regulator, the eombinationivitl'i a boiler andcombustion regte lating' apparatus, of gravity operated means and meanswhich acts against said grravity operated,means, an element displaceableby steam pressure of" the boiler for moving the gravity operated means,a power supplying medium control shifted by the g 'avity oper atedmeans, the movement of whichsupplies the said medium for moving thecombustion regulating apparatus and the means which act against saidgravity operated l'l'lEflDS to restore said gravity operated means to approximately its position before it was shifted whereby a predeterminedvariation in the boiler pressure will shift said power supplying mediumcontrol in the opposite direction thereby releasing said medimn. andmeans for accelerating said movement.

5. A regulator-for controlling combustion in steam boiler furnacescomprising means displaceableby pressure of steam in a boiler,

gravity operated elements moved by said' means, a combustion controllingmember, a

device for moving the combustion controlling member, a power supplyingmedium for said device, a control for the power supplying medium actnetted by said elements whereby power issupplied and released, meansoperated by the'device for moving the combustion controlling memberacting against gravity of said elements for restor' lug said elements toapproximately the posi tion they occupied prior to their first mentioued movement and means for restoring said gravity operated elementsto their first mentioned position when the boilerpressure is reducedbeyond a predetermimal degree. (5. A regulator for controllingcombustion in steam boiler furnaces comprising means displaceable bypressure of steam in a boiler, gravity operated elements moved by saidmeans. a combustion controlling member, a device for moving theeon'ibustion controlling n'iember. a power supplying medium for saiddevice, a control for the power supplying medium actuated by saidelements, whereby power is supplied and released, means operated by thedevice for moving the combustion controlling member, acting againstgravity of said elements for restorin; said elements to approximatelythe positions they occupied prior to their first mentioltetl movement,means for restoring said gravity operated elements to their firstmentioned position when the boiler pressure reduced beyond apredctern'iined degree a-tid means for accelerating said movement.

7. regulator .tor controlling combustion in steam boiler furnaces, atank havingcomuumieation with the. boiler, a movable receptacle in anelevated position in communication with the tank, means of communicationbetween the tank and receptacle whereby fluid in the tank may be forcedinto the receptacle by the PI'QSSUIB in the boiler, an osciltatablemember to which the said re ceptaele is connected near one end, a weightconnected to the lever near its opposite end, a rod connected to saidlever at the end to which the first mentioned n'iembei" is connected,valve operating elements on the said rod spaced apart from each other, acombos tion control, a pressure operated device for moving thecon'ibustion control, a valve for admitting pressure to said pressureoperated device and for releasing said pressure, connections fordelivering pressure and for releasing pressure to said pressure operateddevice, means whereby the movement of the valve operating, element'scommunicates motion toithe valve when the weight. of material in thereceptacle overcomes the gravity of the mechanism for operating thevalve, means where y the pressure operated device restores the saidreceptacle andlthe parts connected to it to approximately the positionit occupied prior to its first mentioned movement. a gravity elementassociated with thedever for applying power to said level} when thegravity element shifts from onto} side to the other of the pivot of saidlever and supplementing the action of the weight memb associated withsaid lever to accelerate the movement of the valve 0 crating mechanismwhen pressure in the oiler has varied a predetermined degree, therebyshifting the valve to release the pressure in the pressure operateddevice and gravity operated means for restoring the combustioncontrolling 8. In a boiler ressure regulator, the combinat'ion with tlFeboiler, of a combustion regulating aplparatus, a mercur receptacle, apressure 0 amber connecte with said boiler and said mercury receptacle,a valve, rods connected to the mercury receptacle which actuates saidvalve, a pressure cylinder, a piston therein which is connected to thecombustion regulating device, a governor to impart initial movement tosaid rod, said governor being connected to the piston of the pressurecylinder to restore said rods to approximately their position beforethey were shifted, whereby a predetermined variation in the boilerpressure will shift said rods in the opposite direction, and means toaccelerate the movements of said governor.

9. In a boiler ressure regulator, the combination with t e boiler, of acombustion regulating apgaratus, a mercur receptacle, a pressure 0 amberconnected boiler and said mercury receptacle, a valve, rods connected tothe mercury receptacle which actuates said valve, a pressure cylinder, apiston therein which is-connected to the combustion re lating device, anoscillating tube which is connected to the iston oft epressure cylinderto impart initial movement to said rods to restore said; rods toapproximately their 'position before they were shifted, whereby apredetermined variation in the boiler pressure will shift said with saidrods in the opposite direction and a mov- A able medium in said tube toaccelerate the movements of said tube.

Signed at Chicago, Illinois, this 25th day of April, 1916.

ISAAC A. BAQKLUND.

